The paper discusses theories and methods of small watershed land utilization plan

four study programmes is posed

firstly analyzing economic system of small watershed

making clear different function of different location of small watershed and trouble; secondly according to natural and social economical feature

studying natural suitability

analysis of economical system input output reveals superiority of agricultural development

decide best agricultural structure of product and optimal goals; thirdly goal programming defines quantitative structure; finally theory and method of landscape ecology define space structure; which will optimize collocation of land resource of small watershed

exerting function and potential of land resource

achieving the goal of small watershed sustainable development.